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# T-SQL showing missing document numbers

Hi

Need some help with a query to display missing document number. Field1 is a sequence number, how can I return the numbers that are missing from Field1?

Need some help with a query to display missing document number. Field1 is a sequence number, how can I return the numbers that are missing from Field1?

You could do a LAG function, and where the LAG is more than one, you have your gap.

This may have the added advantage of grouping together the gaps, so that numbers 10-20 are missing, you will see a GAP from 10-20, instead of a Gap in 10, 11, 12, 13, 14 etc.

This may have the added advantage of grouping together the gaps, so that numbers 10-20 are missing, you will see a GAP from 10-20, instead of a Gap in 10, 11, 12, 13, 14 etc.

;with cte(row_num) as

(select min(field1) as row_num from yourtable

union all

select row_num + 1 from cte

where row_num < (select max(field1) from yourtable)

)

select * from cte

except

select field1 from yourtable;

(select min(field1) as row_num from yourtable

union all

select row_num + 1 from cte

where row_num < (select max(field1) from yourtable)

)

select * from cte

except

select field1 from yourtable;

ASKER

@ Shaun :

I added the required table info to the query.

";WITH e1(n) AS

(

SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL

SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL

SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1

), -- 10

e2(n) AS (SELECT 1 FROM e1 CROSS JOIN e1 AS b), -- 10*10

e3(n) AS (SELECT 1 FROM e1 CROSS JOIN e2), -- 10*100

e4(n) AS (SELECT ROW_NUMBER() OVER (ORDER BY n) FROM e3 )

SELECT e4.n

FROM e4

LEFT OUTER JOIN Files ON e4.n = Files.Field1

WHERE Field1 IS NULL

ORDER BY n;"

Got the following reply.

Msg 8114, Level 16, State 5, Line 1

Error converting data type varchar to bigint.

Field1 is a varchar(255), how can I convert it?

I added the required table info to the query.

";WITH e1(n) AS

(

SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL

SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL

SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1

), -- 10

e2(n) AS (SELECT 1 FROM e1 CROSS JOIN e1 AS b), -- 10*10

e3(n) AS (SELECT 1 FROM e1 CROSS JOIN e2), -- 10*100

e4(n) AS (SELECT ROW_NUMBER() OVER (ORDER BY n) FROM e3 )

SELECT e4.n

FROM e4

LEFT OUTER JOIN Files ON e4.n = Files.Field1

WHERE Field1 IS NULL

ORDER BY n;"

Got the following reply.

Msg 8114, Level 16, State 5, Line 1

Error converting data type varchar to bigint.

Field1 is a varchar(255), how can I convert it?

CAST(Field1 AS BIGINT)

;with cte(row_num) as

(select min(cast(field1 as bigint) as row_num from yourtable

union all

select row_num + 1 from cte

where row_num < (select max(cast(field1 as bigint) from yourtable)

)

select * from cte

except

select cast(field1 as bigint) from yourtable;

(select min(cast(field1 as bigint) as row_num from yourtable

union all

select row_num + 1 from cte

where row_num < (select max(cast(field1 as bigint) from yourtable)

)

select * from cte

except

select cast(field1 as bigint) from yourtable;

ASKER

Hi Awking

Tried the query as follows.

;with cte(row_num) as

(select min(cast(field1 as bigint) as row_num from Files

union all

select row_num + 1 from cte

where row_num < (select max(cast(field1 as bigint) from Files)

)

select * from cte

except

select cast(field1 as bigint) from Files;

This error is displaying when you hover over line 2.

'min' is not a recognized built in function name.

Also get the following errors when try to execute query.

Msg 156, Level 15, State 1, Line 2

Incorrect syntax near the keyword 'from'.

Msg 156, Level 15, State 1, Line 5

Incorrect syntax near the keyword 'from'.

Tried the query as follows.

;with cte(row_num) as

(select min(cast(field1 as bigint) as row_num from Files

union all

select row_num + 1 from cte

where row_num < (select max(cast(field1 as bigint) from Files)

)

select * from cte

except

select cast(field1 as bigint) from Files;

This error is displaying when you hover over line 2.

'min' is not a recognized built in function name.

Also get the following errors when try to execute query.

Msg 156, Level 15, State 1, Line 2

Incorrect syntax near the keyword 'from'.

Msg 156, Level 15, State 1, Line 5

Incorrect syntax near the keyword 'from'.

Sorry, left out a parenthesis -

min(cast(field1 as bigint)

max(cast(field1 as bigint)

min(cast(field1 as bigint)

**)**==> line 2max(cast(field1 as bigint)

**)**==> line 5
please see the solution here

```
DECLARE @StartNo BIgInt = 1;
DECLARE @EndNo BigInt = 5000;
with
x as (
select Field1, row_number() over (order by Field1) rn
from MyTable t
where Field1>= @StartNo and Field1<= @EndNo
)
select x1.Field1+1 gap_start, x2.Field1-1 gap_end
from x x1 inner join x x2 on x1.rn=x2.rn-1
where x1.Field1!= x2.Field1-1
```

ASKER

Awking.

Changed the query to the following.

;with cte(row_num) as

(select min(cast(field1 as bigint)) as row_num from Files

union all

select row_num + 1 from cte

where row_num < (select max(cast(field1 as bigint)) from Files)

)

select * from cte

except

select cast(field1 as bigint) from Files;

Got this error.

sg 467, Level 16, State 1, Line 1

GROUP BY, HAVING, or aggregate functions are not allowed in the recursive part of a recursive common table expression 'cte'.

Changed the query to the following.

;with cte(row_num) as

(select min(cast(field1 as bigint)) as row_num from Files

union all

select row_num + 1 from cte

where row_num < (select max(cast(field1 as bigint)) from Files)

)

select * from cte

except

select cast(field1 as bigint) from Files;

Got this error.

sg 467, Level 16, State 1, Line 1

GROUP BY, HAVING, or aggregate functions are not allowed in the recursive part of a recursive common table expression 'cte'.

ASKER

@Hainkurt

This is your query that I tried.

DECLARE @StartNo BIgInt = 1;

DECLARE @EndNo BigInt = 5000;

with

x as (

select Field1, row_number() over (order by Field1) rn

from Files t

where Field1>= @StartNo and Field1<= @EndNo

)

select x1.Field1+1 gap_start, x2.Field1-1 gap_end

from x x1 inner join x x2 on x1.rn=x2.rn-1

where x1.Field1!= x2.Field1-1

Got the following error.

Msg 8114, Level 16, State 5, Line 4

Error converting data type varchar to bigint.

This is your query that I tried.

DECLARE @StartNo BIgInt = 1;

DECLARE @EndNo BigInt = 5000;

with

x as (

select Field1, row_number() over (order by Field1) rn

from Files t

where Field1>= @StartNo and Field1<= @EndNo

)

select x1.Field1+1 gap_start, x2.Field1-1 gap_end

from x x1 inner join x x2 on x1.rn=x2.rn-1

where x1.Field1!= x2.Field1-1

Got the following error.

Msg 8114, Level 16, State 5, Line 4

Error converting data type varchar to bigint.

Msg 8114, Level 16, State 5, Line 4

Error converting data type varchar to bigint

what is Field1 datatype? it cannot produce this message if Field1 is int or bigint or whatever int...

```
DECLARE @StartNo BIgInt = 100;
DECLARE @EndNo BigInt = 200;
with
Files as (select 121 Field1 union select 122 union select 125 union select 132),
x as (
select Field1, row_number() over (order by Field1) rn
from Files t
where Field1>= @StartNo and Field1<= @EndNo
)
select x1.Field1+1 gap_start, x2.Field1-1 gap_end
from x x1 inner join x x2 on x1.rn=x2.rn-1
where x1.Field1!= x2.Field1-1
gap_start gap_end
123 124
126 131
```

above is with a sample data... working fine...

ASKER

Hi HainKurt

Field1 is a varchar(255)

Field1 is a varchar(255)

actually I should write an article to find a gap...

this is generic solution... that finds gaps over IdNo in MyTable... for a given interval... determined by StartNo & EndNo

this is generic solution... that finds gaps over IdNo in MyTable... for a given interval... determined by StartNo & EndNo

```
DECLARE @StartNo BIgInt = 100;
DECLARE @EndNo BigInt = 200;
with
x as (
select IdNo, row_number() over (order by IdNo) rn
from MyTable t
where IdNo>= @StartNo and IdNo<= @EndNo
)
select x1.IdNo+1 gap_start, x2.IdNo-1 gap_end
from x x1 inner join x x2 on x1.rn=x2.rn-1
where x1.IdNo!= x2.IdNo-1
```

Field1 is a varchar(255)

you said sequence number in first post... anyways, just use:

Field1 >>>>> cast (Field1 as bigint)

```
DECLARE @StartNo BIgInt = 100;
DECLARE @EndNo BigInt = 200;
with
x as (
select Cast(Field1 as bigint) Field1, row_number() over (order by Field1) rn
from Files t
where Cast(Field1 as bigint)>= @StartNo and Cast(Field1 as bigint)<= @EndNo
)
select x1.Field1+1 gap_start, x2.Field1-1 gap_end
from x x1 inner join x x2 on x1.rn=x2.rn-1
where x1.Field1!= x2.Field1-1
```

ASKER

@Hainkurt

I made the following changes to the query.

DECLARE @StartNo BIgInt = 100;

DECLARE @EndNo BigInt = 200;

with

x as (

select Field1, row_number() over (order by field1) rn

from Files t

where Field1>= @StartNo and Field1<= @EndNo

)

select x1.Field1+1 gap_start, x2.Field1-1 gap_end

from x x1 inner join x x2 on x1.rn=x2.rn-1

where x1.Field1!= x2.Field1-1

Still getting this error.

Msg 8114, Level 16, State 5, Line 4

Error converting data type varchar to bigint.

Am I doing something wrong?

I made the following changes to the query.

DECLARE @StartNo BIgInt = 100;

DECLARE @EndNo BigInt = 200;

with

x as (

select Field1, row_number() over (order by field1) rn

from Files t

where Field1>= @StartNo and Field1<= @EndNo

)

select x1.Field1+1 gap_start, x2.Field1-1 gap_end

from x x1 inner join x x2 on x1.rn=x2.rn-1

where x1.Field1!= x2.Field1-1

Still getting this error.

Msg 8114, Level 16, State 5, Line 4

Error converting data type varchar to bigint.

Am I doing something wrong?

i don't see your changes!

ASKER

Hi

I added our table name to the query.

DECLARE @StartNo BIgInt = 100;

DECLARE @EndNo BigInt = 200;

with

x as (

select Field1, row_number() over (order by field1) rn

from Files t

where Field1>= @StartNo and Field1<= @EndNo

)

select x1.Field1+1 gap_start, x2.Field1-1 gap_end

from x x1 inner join x x2 on x1.rn=x2.rn-1

where x1.Field1!= x2.Field1-1

Where in the query must the cast (Field1 as bigint) be inserted?

I added our table name to the query.

DECLARE @StartNo BIgInt = 100;

DECLARE @EndNo BigInt = 200;

with

x as (

select Field1, row_number() over (order by field1) rn

from Files t

where Field1>= @StartNo and Field1<= @EndNo

)

select x1.Field1+1 gap_start, x2.Field1-1 gap_end

from x x1 inner join x x2 on x1.rn=x2.rn-1

where x1.Field1!= x2.Field1-1

Where in the query must the cast (Field1 as bigint) be inserted?

see my post ID: 40516055 ^^^

I posted the query, as is... just copy & paste...

changes are on line 6 & 8 in that script...

I posted the query, as is... just copy & paste...

changes are on line 6 & 8 in that script...

ASKER

Hainkurt

Thank you, just ran the query but I still get the following error.

Msg 8114, Level 16, State 5, Line 4

Error converting data type varchar to bigint.

Thank you, just ran the query but I still get the following error.

Msg 8114, Level 16, State 5, Line 4

Error converting data type varchar to bigint.

```
DECLARE @StartNo BIgInt = 100;
DECLARE @EndNo BigInt = 200;
with
x as (
select Cast(Field1 as bigint) Field1, row_number() over (order by Field1) rn
from Files t
where Cast(Field1 as bigint)>= @StartNo and Cast(Field1 as bigint)<= @EndNo
)
select x1.Field1+1 gap_start, x2.Field1-1 gap_end
from x x1 inner join x x2 on x1.rn=x2.rn-1
where x1.Field1!= x2.Field1-1
```

then your Filed1 is not bigint!

if that's the case no solution exists...

run this to find those garbage entries

select isnumeric(Field1)=0 from Files

or, you can ignore (?) them maybe...

if that's the case no solution exists...

run this to find those garbage entries

select isnumeric(Field1)=0 from Files

or, you can ignore (?) them maybe...

here is the solution that ignores those invalid values:

```
DECLARE @StartNo BIgInt = 100;
DECLARE @EndNo BigInt = 200;
with
x as (
select Cast(Field1 as bigint) Field1, row_number() over (order by Field1) rn
from Files t
where isnumeric(Field1)=1 and Cast(Field1 as bigint)>= @StartNo and Cast(Field1 as bigint)<= @EndNo
)
select x1.Field1+1 gap_start, x2.Field1-1 gap_end
from x x1 inner join x x2 on x1.rn=x2.rn-1
where x1.Field1!= x2.Field1-1
```

ASKER

HainKurt

Thanks, the query returned the following data.

gap_start gap_end

158649 158653

158655 158664

158673 158681

158708 158719

158721 158724

158726 158885

158887 158887

How can I only display the missing numbers in the sequence?

Thanks, the query returned the following data.

gap_start gap_end

158649 158653

158655 158664

158673 158681

158708 158719

158721 158724

158726 158885

158887 158887

How can I only display the missing numbers in the sequence?

that requires a new question :)

ASKER CERTIFIED SOLUTION

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You can increase the number table by adding either changing the e3(n) line so that you cross join e2 with e2 or by adding another line to the number table.